docs/164461: Update ftp mirror list

[danger at FreeBSD.org]

Synopsis: Update ftp mirror list

State-Changed-From-To: open->closed
State-Changed-By: danger
State-Changed-When: Mon Jan 30 12:22:44 UTC 2012
State-Changed-Why: 
- www and ftp were in the list already, but I added http for ftp which
  I saw to be available
- as of rsync, I didn't added it, because I got timeout on the
  standard rsync port.

http://www.freebsd.org/cgi/query-pr.cgi?pr=164461